JPH08112250A - Fluid pipeline changeover operation valve for endoscope - Google Patents

Abstract

PURPOSE: To provide a sanitary fluid pipeline changeover operation valve for an endoscope which enables cleaning of the inside of a cylinder body by brushing over the entire length thereof easily and completely. CONSTITUTION: A piston body 18 projecting forward is fitted into a cylinder body 11 so arranged to open on the side of the front of an operating part 2 free to slide axially and is operated to slide to switch a connecting relationship of a plurality of fluid pipelines 14, 15 and 16 connected to the side of the cylinder body 11. In a fluid pipeline changeover operation valve of an endoscope of such a type, a bottom part of the cylinder body 11 is arranged being opened on the rear side of the operating part 2 while the piston body 18 is made free to withdraw from the cylinder body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid pipe line switching operation valve for an endoscope for performing air / water supply operation, suction operation, and the like.

[0002]

2. Description of the Related Art In general, an air supply / water supply operation valve and a suction operation valve of an endoscope have a piston body projecting forward in a cylinder body arranged in the operation section so as to open on the front side of the operation section. By slidably inserting in the direction and sliding operation of the piston body, the connection relationship of the air supply pipe line, the water supply pipe line or the suction pipe line connected to the side surface of the cylinder body is switched. .

However, in order to prevent an accident of patient-to-patient infection through the endoscope, the endoscope needs to be cleaned and disinfected after each use, and an air / water supply operation valve and a suction operation are required. The valve must be cleaned by brushing the inside of the cylinder body.

Therefore, conventionally, the piston body is removed from the cylinder body to the front, and a cleaning brush is inserted into the empty cylinder body from the front to clean the inner wall of the cylinder body by brushing.

[0005]

However, even if a cleaning brush is put into the elongated cylinder body from the front mouth and the inside of the cylinder body is brushed, the brush is hard to hit near the bottom of the cylinder body. Very difficult to do.

This is because when washing the inside of the bottle, even if a brush is put from the mouth of the bottle to brush the inside thoroughly, it is difficult to clean the vicinity of the bottom of the bottle, especially the corner of the bottom. Is the same as.

Therefore, the filth may gradually stick to the vicinity of the bottom of the cylinder body and bacteria and the like may propagate, causing infection between patients. Therefore, an object of the present invention is to provide a hygienic endoscope fluid line switching operation valve capable of easily and completely brushing and cleaning the entire cylinder body.

[0008]

In order to achieve the above object, a fluid pipe line switching operation valve for an endoscope according to the present invention is forwardly mounted in a cylinder body which is arranged so as to open on the front side of an operating portion. An endoscope in which a projecting piston body is slidably inserted in an axial direction and the piston body is slid to switch the connection relationship of a plurality of fluid pipes connected to the side surface of the cylinder body. In the fluid conduit switching operation valve, the bottom portion of the cylinder body is arranged on the rear surface side of the operation portion, and the piston body is detachable from the cylinder body.

[0009]

Embodiments will be described with reference to the drawings. FIG. 3 shows an endoscope, in which an operation portion 2 is connected to a proximal end side of an insertion portion 1 formed of a flexible tube, and an eyepiece portion 3 is projectingly provided on an upper end portion thereof.

An air supply / water supply operation valve 4 and a suction operation valve 5 are provided on the upper half of the front surface of the operation portion 2 so as to project forward, and by operating them, the insertion portion 1 of the insertion portion 1 is operated. Tip 1
Air, water, or suction can be performed from a to the outside. Reference numeral 6 denotes a forceps insertion port for inserting a biopsy forceps or the like into the forceps channel.

FIG. 1 shows an air / water supply / operation valve 4, in which a cylinder body 11 is arranged in the operation section 2 so as to extend across a front wall 2a and a rear wall 2b of the operation section 2, and It is fixed to the front wall 2a by the first holding nut 12 and is fixed to the rear wall 2b by the second holding nut 13.

The cylinder body 11 has a uniform inner diameter as a whole and is opened at both front and rear ends with the inner diameter kept unchanged. However, the portion of the operation portion 2 that protrudes forward from the front wall 2a is formed to be slightly thick, and screws are formed on the inner and outer circumferences thereof.

An air supply pipe 14 to which air is supplied, a water supply pipe 15 to which water is supplied, and an air supply / water supply pipe 16 for sending out air or water are spaced from each other on the side wall of the cylinder body 11. Connected.

A piston body 18 is slidably inserted in the cylinder body 11 in the axial direction of the cylinder body 11. The outer peripheral surface of the piston body 18 has two wide circumferential grooves 19, 20 are formed. 21 ... are O-rings for sealing.

Therefore, by sliding the piston body 18 in the cylinder body 11 in the axial direction, the air supply pipe 14 is connected to the air / water supply pipe 16 via the first circumferential groove 19 as shown in FIG. And the state in which the water supply pipe 15 is connected to the air / water supply pipe 16 via the second circumferential groove 20 switches.

A vent hole 23 opening forward is formed in the central shaft portion of the piston body 18, and the vent hole 23 is formed.
Communicate with the first circumferential groove 19 via the communication hole 24. The rear end side of the piston body 18 is closed.

The front end of the piston body 18 projects forward, and a finger rest 25 is screwed to the projecting end. Then, the piston body 18 is constantly urged forward by the coil spring 27 that is compressed and mounted between the retaining ring 26 screwed to the inner periphery of the front end opening of the cylinder body 11 and the finger contact 25. There is.

The stop ring 26 plays a role of a stopper for preventing the piston body 18 from coming out of the cylinder body 11. If the stop ring 26 is removed from the mouth of the cylinder body 11, the piston body 18 and the finger rest 25, etc. Together with it is removed from the cylinder body 11. Reference numeral 28 is a cover ring screwed onto the outer periphery of the front end opening of the cylinder body 11, and may be integrated with the stop ring 26.

The air / water supply operation valve 4 configured as described above
In the standby state shown in FIG. 1, the water supply pipe 1
5 is closed by the piston body 18, and the air sent from the air supply pipe 14 is released to the atmosphere through the vent hole 23 having a small conduit resistance. The air is not sent to the air / water supply pipe 16 having a small inner diameter and a long pipe resistance.

Therefore, when the fingertip is pressed against the surface of the finger rest 25 to close the outlet of the vent hole 23, the outlet of the air sent from the air supply pipe 14 disappears except for the air supply / water supply pipe 16, and the air supply / feeding is performed. Air is sent to the water pipe 16 and enters a so-called air supply state.

Then, when the finger rest 25 is further pushed with the fingertip to push the piston body 18 into the cylinder body 11,
The air / water supply pipe 16 is connected to the water supply pipe 15 via the second circumferential groove 20.
Water is sent to the air / water supply pipe 16 in communication with the air / water supply pipe 16, and a so-called water supply state is established.

When the bottom portion of the cylinder body 11 is opened as in this embodiment when such an air / water feeding operation is repeated, dirt is less likely to accumulate around the bottom portion of the cylinder body 11 and is unlikely to be contaminated.

After the use of the endoscope, the screwing between the retaining ring 26 and the cylinder body 11 is released, and the retaining ring 26 is removed from the mouth of the cylinder body 11. At the same time, the piston body 18 comes out from the inside of the cylinder body 11. The inner peripheral surface of the cylinder body 11 is exposed so as to penetrate the operation portion 2.

Therefore, the cleaning brush is inserted into the cylinder body 11 having a completely cylindrical shape without a bottom, and the cylinder body 1
The inner peripheral surface of 1 can be easily brushed over the entire length, and the inner peripheral surface of the cylinder body 11 can be completely cleaned.

FIG. 2 shows the suction operation valve 5, which is different from the air / water operation valve 4 mainly in the piping.
The basic structure is not much different from the air / water supply operation valve 4. In addition,
A forceps plug 61 made of rubber is attached to the forceps insertion port 6 and is closed except when forceps or the like is inserted.

The cylinder body 31, which is arranged in the operating portion 2 so as to extend between the front wall 2a and the rear wall 2b of the operating portion 2, has a uniform inner diameter as a whole, and has a first pressing nut 32.
Is fixed to the front wall 2a by the second holding nut 33
It is fixed to the rear wall 2b by.

On the side wall of the cylinder body 31, a suction tube 34 connected to an external suction device and a forceps channel 36 are connected, and the forceps channel 36 is attached to the tip 1a of the insertion portion 1.
Also serves as a suction tube.

A circumferential groove 40 is formed on the outer peripheral surface of the piston body 38 which is slidably fitted in the cylinder body 31 in the axial direction.
By sliding the piston body 38 in the axial direction, the suction tube 34 and the forceps channel 36 are closed by the piston body 38 as shown in FIG. Is switched to the suction state in which it communicates with the forceps channel 36 via the circumferential groove 40.

A vent hole 43 opening forward is formed in the central shaft portion of the piston body 38, and the vent hole 43 is formed.
Communicate with the circumferential groove 40 via the communication hole 44. The rear end of the piston body 38 is closed.

The front end of the piston body 38 protrudes forward, and a finger rest 45 is screwed and connected to the front end of the piston body 38, and compressed between a retaining ring 46 screwed to the front end of the cylinder body 31 and the finger rest 45. The coil spring 47 thus mounted always urges the piston body 38 forward.

The stop ring 46 plays a role of a stopper for preventing the piston body 38 from coming out of the cylinder body 31, and if the stop ring 46 is removed from the mouth of the cylinder body 31, the piston body 38 and the finger rest 45, etc. Together with it is removed from the cylinder body 31. Reference numeral 48 is a cover ring integrated with the retaining ring 46.

In the suction operation valve 5 thus constructed, in the standby state shown in FIG. 2, the atmosphere is sucked into the suction pipe 34 through the ventilation hole 43, and the finger rest 45 is closed by the fingertip to allow the piston body to move. When 38 is pushed into the cylinder body 31, the suction tube 34 and the forceps channel 36 are communicated with each other through the circumferential groove 40 and the communication hole 44, and suction is performed from the forceps channel 36.

When the bottom portion of the cylinder body 31 is opened as in this embodiment when the above suction operation is repeated, dirt is less likely to accumulate around the bottom portion of the cylinder body 31 and is unlikely to be contaminated.

After the use of the endoscope, the stop ring 46 and the cylinder body 31 are unscrewed to remove the stop ring 46 from the mouth of the cylinder body 31, and the piston body 38 is removed from the inside of the cylinder body 31 at the same time. The inner peripheral surface of the cylinder body 31 is exposed so as to penetrate the operating portion 2.

Therefore, by inserting the cleaning brush into the cylindrical body 31 having a completely cylindrical shape without a bottom, the cylinder body 3
The inner peripheral surface of 1 can be easily brushed over the entire length, and the inner peripheral surface of the cylinder body 31 can be completely cleaned.

[0036]

According to the present invention, since the bottom portion of the cylinder body which is open on the front surface side of the operation portion is disposed on the rear surface side of the operation portion, dirt and the like are less likely to collect near the bottom portion of the cylinder body. Then, if the piston body is removed from the cylinder body, the inner peripheral surface of the cylinder body is exposed so as to penetrate the operating portion.Therefore, insert the cleaning brush into the cylinder body with a perfect cylinder without a bottom, The inner peripheral surface of the body can be easily and completely cleaned over the entire length, and the occurrence of infection between patients due to poor cleaning inside the cylinder body can be prevented.

[Brief description of drawings]

FIG. 1 is a side sectional view of an air / water feeding operation valve according to an embodiment.

FIG. 2 is a side sectional view of the suction operation valve of the embodiment.

FIG. 3 is a side view of the endoscope of the embodiment.

[Explanation of symbols]

 2 Operation part 4 Air supply / water supply operation valve 11 Cylinder body 14 Air supply pipe 15 Water supply pipe 16 Air supply / water supply pipe 18 Piston body

Claims (1)

[Claims] 1. A cylinder body, which is arranged so as to be open on the front side of an operating portion, has a piston body projecting forward fitted slidably in the axial direction, and the piston body is slid so that the cylinder body can be operated. In a fluid conduit switching operation valve for an endoscope configured to switch the connection relationship of a plurality of fluid conduits connected to the side surface of the body, the bottom portion of the cylinder body is arranged on the rear surface side of the manipulation portion, and A fluid pipe line switching operation valve for an endoscope, wherein the piston body is configured to be removable from the cylinder body.